Microwave stack tray



FIG. 1 is a perspective view of a microwave stack tray, showing our newdesign;

FIG. 2 is a front view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a top view thereof; and,

FIG. 5 is a bottom view thereof.

The ornamental design for a microwave stack tray, as shown.